Commit f9d0c531 authored by chenjiajun's avatar chenjiajun Committed by liangtian
Browse files

kvm: debugfs: add EXIT_REASON_PREEMPTION_TIMER to vcpu_stat 

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I919BF


CVE: NA

-----------------------------------------

Export EXIT_REASON_PREEMPTION_TIMER kvm exits to vcpu_stat debugfs.
Add a new column to vcpu_stat, and provide preemption_timer status to
virtualization detection tools.

Signed-off-by: default avatarchenjiajun <chenjiajun8@huawei.com>
Signed-off-by: default avatarliangtian <liangtian13@huawei.com>
parent 84d4616c

arch/x86/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -1531,6 +1531,7 @@ struct kvm_vcpu_stat { 
	u64 utime;

	u64 stime;

	u64 gtime;

	u64 preemption_timer_exits;

	u64 nested_run;

	u64 directed_yield_attempted;

	u64 directed_yield_successful;

arch/x86/kvm/vmx/vmx.c

+2 −0
Original line number Diff line number Diff line
@@ -6012,6 +6012,7 @@ static fastpath_t handle_fastpath_preemption_timer(struct kvm_vcpu *vcpu) 


static int handle_preemption_timer(struct kvm_vcpu *vcpu)

{

	++vcpu->stat.preemption_timer_exits;

	handle_fastpath_preemption_timer(vcpu);

	return 1;

}
@@ -7219,6 +7220,7 @@ static fastpath_t vmx_exit_handlers_fastpath(struct kvm_vcpu *vcpu) 
		++vcpu->stat.msr_wr_exits;

		return handle_fastpath_set_msr_irqoff(vcpu);

	case EXIT_REASON_PREEMPTION_TIMER:

		++vcpu->stat.preemption_timer_exits;

		return handle_fastpath_preemption_timer(vcpu);

	default:

		return EXIT_FASTPATH_NONE;

arch/x86/kvm/x86.c

+1 −0
Original line number Diff line number Diff line
@@ -280,6 +280,7 @@ struct dfx_kvm_stats_debugfs_item dfx_debugfs_entries[] = { 
	DFX_STAT("utime", utime),

	DFX_STAT("stime", stime),

	DFX_STAT("gtime", gtime),

	DFX_STAT("preemption_timer_exits", preemption_timer_exits),

	{ NULL }

};

#endif